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package com.oracle.svm.hosted.pltgot.aarch64;

import java.lang.reflect.Method;

import com.oracle.svm.core.aarch64.SubstrateAArch64MacroAssembler;
import com.oracle.svm.core.pltgot.aarch64.AArch64ExitMethodAddressResolutionOp;
import com.oracle.svm.core.pltgot.aarch64.AArch64MethodAddressResolutionDispatcher;
import com.oracle.svm.hosted.pltgot.HostedPLTGOTConfiguration;
import com.oracle.svm.hosted.pltgot.PLTStubGenerator;
import com.oracle.svm.util.ReflectionUtil;

import jdk.graal.compiler.lir.LIRInstruction;
import jdk.vm.ci.code.Register;
import jdk.vm.ci.code.RegisterConfig;
import jdk.vm.ci.code.RegisterValue;

public final class AArch64HostedPLTGOTConfiguration extends HostedPLTGOTConfiguration {

    @Override
    public Method getArchSpecificResolverAsMethod() {
        return ReflectionUtil.lookupMethod(AArch64MethodAddressResolutionDispatcher.class, "resolveMethodAddress");
    }

    @Override
    public PLTStubGenerator getArchSpecificPLTStubGenerator() {
        return new AArch64PLTStubGenerator();
    }

    @Override
    public Register getExitMethodAddressResolutionRegister(RegisterConfig registerConfig) {
        return SubstrateAArch64MacroAssembler.scratch2;
    }

    @Override
    public LIRInstruction createExitMethodAddressResolutionOp(RegisterValue exitThroughRegisterValue) {
        return new AArch64ExitMethodAddressResolutionOp(exitThroughRegisterValue);
    }

    @Override
    public Register getGOTPassingRegister(RegisterConfig registerConfig) {
        throw new UnsupportedOperationException("AArch64 passes got entries via (unused) deopt frame handle slot.");
    }
}
